Writing instrument



FIG. 1 is a first front perspective view of a writing instrument of the present invention.

FIG. 2 is a second front perspective view of the design of FIG. 1.

FIG. 3 is a front view of the design of FIG. 1.

FIG. 4 is a rear view of the design of FIG. 1.

FIG. 5 is a left side view of the design of FIG. 1.

FIG. 6 is a right side view of the design of FIG. 1.

FIG. 7 is a top view of the design of FIG. 1; and,

FIG. 8 is a bottom view of the design of FIG. 1. 

CLAIM The ornamental design for a writing instrument, as shown and described. 